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An IBM Open Source Project

A lightweight open framework for building fast and efficient cloud-native Java microservices.

Build cloud-native apps and microservices while running only what you need. Open Liberty is the most flexible server runtime available to JavaTM developers in this solar system.

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Develop Cloud-native Java microservices

Open Liberty is fast to start up with a low memory footprint and live reload for quick iteration. Simple to add and remove features from the latest versions of MicroProfile and Jakarta EE. Zero migration let’s you focus on what's important, not the APIs changing under you.

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Deploy in containers to any cloud

Containerized and deployable with fast throughput on any Kubernetes cloud. Battle-hardened and proven in production, with zero migration. Easy-to-manage configuration from development to test to production.

Monitor microservices in the cloud

Trace your live microservices. Gather metrics and configure alerts, and browse metrics in dashboards. Consolidate and analyze logs from across your hybrid cloud.

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OpenJ9 start-up time graph: Open Liberty vs. other lightweight Java servers
Hotspot start-up time graph: Open Liberty vs. other lightweight Java servers

Open Liberty integrates with the Open Source community









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Open Liberty News

Check out the latest news on our blog and follow us on Twitter.

Testing database connections in Open Liberty apps with REST APIs

A simple way to test your database connections via REST endpoints that are automatically enabled by combining the restConnector-2.0 feature with features supporting configuration validation. The REST endpoints exercise the same code paths as your applications, giving you confidence in your server configuration.

View all Open Liberty Blog posts

A crew that supports you

As a member of the Open Liberty crew, you have the support and expertise of an entire community at your fingertips. Don't forget to lean on them when you have questions!

And for times that you need an extra boost, check out Open Liberty Enterprise Support from IBM.

Get Open Liberty support
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Get involved

Open Liberty thrives on users’ collaboration, contributions and creativity. We invite you to share your skills and ideas with users in this galaxy and beyond.

Here are some of our awesome contributors!

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